What has been the most significant cause of the decline in death rate in less developed countries? A. The discovery and dissemination of the smallpox vaccine
B. The beginning of scientific medicine and formal medical collage
C. The transfer of disease prevention methods to less developed countries
D. The development of methods of containing disease- carrying bacteria
E. The beginning of the single-payer health care system in Western Europe

20 brainliest for whoever answers correctly and answers all choose the statements that accurately describe china's "one child policy." china's "one child policy" began as soon as the communists came to power. the "one child policy" was meant to keep the population from reaching 700 million. the "one child policy" was meant to slow china's population growth. the "one child policy" began as a result of the country's war with japan. some people were allowed to have more than one child. the "one child policy" began in 1979. the "one child policy" was most enforced in urban areas. the "one child policy" ended at the start of 2016. china's population is current just under 1 billion people.

What does the kyoto protocol aim to reduce

What are the answers for the following questions?